I Have a Suggestion for Similar Worlds

If there's a way to join groups automatically from the 'Group' section without having to click on their individual pages, that'd be great (although there might be a way to do that and I'm just unsure about it as I've only just joined).
Finish the private messaging set-up.
Create a section for entirely adult stories that allow people to say stuff about mature topics without having to censor them. Like you could make it so you have to be a member and you have to be 18+ to get read them?